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So what I'm showing you here is what a system might look like to do just this.
我現在向你們展示的是一個具備這種功能的系統可能的樣子。
This is called an air contactor.
它被稱為空氣接觸器。
You can see it has to be really, really wide in order to have a high enough surface area to process all of the air required,
可以看到，它必須設計得非常非常寬，這樣才能獲得足夠大的表面積來處理所有需要的空氣，
because remember, we're trying to capture just 400 molecules out of a million.
請謹記，我們要嘗試在一百萬個分子之中捕獲僅僅四百個分子。
Using the liquid-based approach to do this, you take this high surface area packing material,
若使用液體材料來捕獲二氧化碳，需要選用表面積大的填充材料，
you fill the contactor with the packing material, you use pumps to distribute liquid across the packing material,
將空氣接觸器裝滿，再使用泵驅動，并確保液體在填充材料之間充分流動，
and you can use fans, as you can see in the front, to bubble the air through the liquid.
然后你就可以使用風扇，從裝置的前面將空氣吹進裝置，以氣泡的形態穿過液體。
The CO2 in the air is separated the liquid by reacting with the really strong-binding CO2 molecules in solution.
空氣中的二氧化碳與液體材料發生反應，從而將二氧化碳分子分離出來。
And in order to capture a lot of CO2, you have to make this contactor deeper.
為了能捕獲更多的二氧化碳，還必須將接觸器造得更深。
But there's an optimization, because the deeper you make that contactor,
但是這種提升并不是無限的，因為接觸器造得越深，
the more energy you're spending on bubbling all that air through.
制造氣泡所消耗的能量也越多。
So air contactors for direct air capture have this unique characteristic design,
所以直接捕捉空氣的空氣接觸器就具備了這個獨一無二的設計，
where they have this huge surface area, but a relatively thin thickness.
巨大的表面積和相對較薄的厚度。
